Land Rover Discovery: Wipers and Washers
COMPONENT LOCATION
- Central Junction Box (CJB)
- Rain/light sensor
- Rear Junction Box (RJB)
- Rear window wiper motor
- Rear window washer jet
- Instrument Cluster (IC)
- Windshield wiper motor and linkage assembly
- Windshield washer jet
- Engine Junction Box (EJB)
- Windshield washer reservoir
- Headlamp washer jet (2 off)
- Right steering wheel switchpack
OVERVIEW
Windshield wiper and washer operation is controlled by the Central
Junction Box (CJB) in response to driver inputs and if fitted, signals from the
rain/light sensor.
The wiper and washer system comprises:
- Windshield wiper motor and linkage assembly
- Windshield washer jets - located in cowl panel
- Rear window wiper motor
- Rear window washer jet - located in rear spoiler
- Headlamp washer (if fitted)
- Rain/light sensor (if fitted).
The windshield wipers have five operational states:
- Intermittent wipers - vehicles without rain/light sensor
- Automatic wipers - vehicles with rain/light sensor - automatic wipers
can
be disabled to operate as intermittent via the Instrument cluster (IC)
menu.
- Flick wipe
- Windshield wash and wipe
- Slow wipe
- Fast wipe.
The rear window wiper has three operational states as follows:
- Rear window wash and wipe
- Intermittent rear window wipe
- Continuous rear window wipe.
A windshield washer reservoir contains washer fluid which is used by both
the front and rear wipers and the headlamp washers (if fitted).
The headlamp washers (if fitted) use a dedicated headlamp washer pump
located in the reservoir. The front and rear washers share a single washer
pump.
On vehicles with a rain/light sensor, the wipers have an 'Auto' function. The
'Auto' function uses an output from the rain/light sensor to the CJB on a
Local Interconnect Network (LIN) bus to provide automatic operation of the
windshield wipers. The rain/light sensor is mounted on the inner surface of
the windshield and transmits infra-red light to determine the amount of
water on the outer surface of the windshield.
DESCRIPTION
READ NEXT:
Windshield Wiper Motor
NOTE:
Right Hand Drive (RHD) wiper assembly shown
Electrical connector
Electric windshield wiper motor
The windshield wiper motor comprises a 12V electric motor and gear w
Rubber mounting (3 off)
Pivot
Motor assembly
Electrical connector
The single speed rear window wiper motor is mounted on the inner panel of
the tailgate and is secured with three bolts. Three
Windshield washer supply hose
Rear window washer supply hose
Washer fluid level sensor
Right headlamp washer supply hose
Headlamp washer pump
Front/rear washer pump
Left headlamp washer supp
SEE MORE:
The level of DEF in the tank is checked via the Instrument Cluster (IC) menu.
When selected the message centre displays the approximate amount of
DEF remaining, providing an estimated km/miles figure remaining, prior to
emptying the tank
The DEF tank is fitted with combined temperature/ultrason
REMOVAL
NOTES:
Removal steps in this procedure may contain installation details.
Some variation in the illustrations may occur, but the essential
information is always correct.
Refer to: Loadspace Trim Panel (501-05 Interior Trim and
Ornamentation, Removal and Installation).
INSTALLATION